针对互质阵列形成的差分共阵(DCA)存在空洞导致虚拟阵列不连续的问题,提出了一种基于阵列内插形成无孔互质阵的双基地多输入多输出雷达测向方法。首先,推导阵列内插的位置与形成的DCA填补空洞的位置,并推导出自由度闭合式;其次,分别在发射阵列和接收阵列将子阵列内插,形成连续的虚拟发射阵列和虚拟接收阵列;然后,利用选择矩阵使等效虚拟信号向量在虚拟发射阵列和虚拟接收阵列中平滑移动得到空间平滑矩阵;最后,利用空间平滑矩阵进行空间谱估计,并通过多重信号分类算法实现角度自动匹配。

A bistatic multiple input multiple output radar vectoring method based on array interpolation to form a hole-free coprime array is proposed to address the problem of virtual array discontinuity due to the existence of holes in the differential common array (DCA) formed by the coprime array. Firstly, the position of array interpolation and the position of formed DCA filling the hole are derived, and the degree of freedom closure is derived. Secondly, the subarrays are interpolated in the transmitting and receiving arrays respectively to form a continuous virtual transmitting array and virtual receiving array. The selection matrix is then used to smooth the equivalent virtual signal vectors in the virtual transmit and receive arrays to obtain the spatial smoothing matrix. Finally, the spatial spectrum is estimated by the spatial smoothing matrix, and the angle is automatically matched by the multiple signal classification algorithm.

TN957.51

国家自然科学基金资助项目